[PATCH v0 4/4] media: chips-media: wave5: Add interrupt timeout while stop_streaming

["Jackson.lee" <jackson.lee@chipsnmedia.com>]

From: Jackson Lee <jackson.lee@chipsnmedia.com>

When stop_streaming is called, an infinite loop may occur in some cases.
To prevent this, add a timeout based on interrupt status before calling
get_result. If no further interrupts are received, the loop should exit.

Fixes: 9707a6254a8a ("media: chips-media: wave5: Add the v4l2 layer")
Cc: stable@vger.kernel.org
Signed-off-by: Jackson Lee <jackson.lee@chipsnmedia.com>
Signed-off-by: Nas Chung <nas.chung@chipsnmedia.com>
---
 drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c   | 5 +++++
 drivers/media/platform/chips-media/wave5/wave5-vpuconfig.h | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c b/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
index b7fa19ea2aac..52ff1ac82e7b 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
@@ -1543,6 +1543,7 @@ static void wave5_vpu_dec_stop_streaming(struct vb2_queue *q)
 	dev_dbg(inst->dev->dev, "%s: type: %u\n", __func__, q->type);
 	pm_runtime_resume_and_get(inst->dev->dev);
 	inst->empty_queue = true;
+
 	while (check_cmd) {
 		struct queue_status_info q_status;
 		struct dec_output_info dec_output_info;
@@ -1554,6 +1555,10 @@ static void wave5_vpu_dec_stop_streaming(struct vb2_queue *q)
 			q_status.report_queue_count == 0)
 			break;
 
+		if (q_status.instance_queue_count > 0 &&
+		    wave5_vpu_wait_interrupt(inst, VPU_DEC_STOP_TIMEOUT) < 0)
+			break;
+
 		if (wave5_vpu_dec_get_output_info(inst, &dec_output_info))
 			dev_dbg(inst->dev->dev, "there is no output info\n");
 	}
diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpuconfig.h b/drivers/media/platform/chips-media/wave5/wave5-vpuconfig.h
index 4ebd48d5550e..e04f2dbf3b65 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpuconfig.h
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpuconfig.h
@@ -59,7 +59,7 @@
 //  application specific configuration
 #define VPU_ENC_TIMEOUT                 60000
 #define VPU_DEC_TIMEOUT                 60000
-#define VPU_DEC_STOP_TIMEOUT            10
+#define VPU_DEC_STOP_TIMEOUT            300
 
 // for WAVE encoder
 #define USE_SRC_PRP_AXI         0
-- 
2.43.0